Editing Tandberg Data TDV 5000 Series (section)

==Parts==
TDV 5000 series keyboards from the early 90s will often have a list of parts making up the keyboard on the back. Most of these parts are used across most of the varieties, and a complete keyboard consist of Electronic+Matrix boards, a controller with firmware, a keycap set, a housing, mechanical parts and the cable. Known part numbers include:
{| class="wikitable sortable"
|-
! Tandberg Part !! Item !! Known Versions
|-
| 967032 || Electronic board RUBY Mk2 TDV 1200 || v2.0
|-
| 967042 || Electronic board PC TDV 5000 || v1.0 v2.0 v4.0
|-
| 967043 || Matrix Board PC || v1.1 v1.3
|-
| 967144 || Firmware TDV 1200 || v1.0
|-
| 967851 || Keytopset TDV 5010 Norwegian || v2.2
|-
| 967855 || Keytopset TDV 5020 Norwegian || v2.2
|-
| 967965 || Housing TDV 1200 MF P/W || v1.0
|-
| 967967 || Mechanical parts || v1.0
|-
| 968551 || Firmware TDV 5000 PC/AT/PS2 || v1.4 v1.7 v1.9 v2.1
|-
| 968552 || Cable PS2 mDIN 2,5m P/W || v1.0
|-
| 968571 || Later version of Electronic board PC TDV 5000 || v1.1
|-
| 968585 || Later version of Firmware TDV 5000 PC/AT/PS2 || v1.0
|}

* 967032 needs firmware 967144, and uses a serial interface. 967042 and 968571 needs firmware 968551 and are PS/2-based. All controller boards supports the 967043 matrix board.

* 968571 is only different from 967042 in that it adds two resistors in series between the MCU and sink transistors. This limits the maximum sinking-current to somewhere between 10-20mA on each PS/2 signal line, protecting the keyboard should the wrong cable be used. v2.0 and v4.0 of 967042 also has 10k or 82k resistors (respectively) added, but as a patch rather than on the PCB itself.

* 968585 seems to be roughtly the same firmware as 968551, but for the 80C52 instead of the 8051.

* 967851 is only different to 967855 in that it has blanks instead of the extra NOTIS-keys. These are both the keycaps with dye-sublimation prints, and the older double-shot keycaps probably have a different order-number. The keycaps on the very early keyboards from 1989 does not have bumps on the F/J/num5 keys, but this was introduced in 1990.